Centrifugal machine



No. 626,597. Patented lune 6, |899.

F. L. DEPEW.

CENTRIFUGAL MACHINE.

(Application led Mar. 8, 1898.) (No Model.) 2 Sheets-Sheet I.

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CENTRIFUGAL MACHINE.

(Application filed Mar. 8, 1898.) (No Model.) 2 Sheets-Shogi 2.

W/7'NESSES /N VENTO? A TTHNE YS;

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Nrn STATES Prion.

ATENT CENTRIFUGAL MACHINE.

sPEcIFIeA'rIoN forming part of Lettere Pete-nt No. 626,597, aerea Junee, 1899.

Serial No. 673,049. (No model.)

.To all whom, t may concern,.-

Be it known that I, FRANK L. DEPEW, of Brookline, in the county ofNorfolk and State of Massachusetts, have invented certain new and usefulImprovements in Centrifugal Machines, of which the following is a full,clear, and exact description.

The invention relates to a centrifugal used in the manufacture ofvarious productssuch as sugar, salt, soda, tc-in fact, any solidmaterial having a large per cent. of moisture ormixed with liquor whereit is desired to separate the solid and fluid and that in a rapid andeconomical manner by the employment of centrifugal force.

My invention providing for the above object is a machine that is simpleand compact in form and construction and effective in operation, and theliability to get out of order is reduced to a minimum, and I have alsoseveral new and, novel features and parts and constructions of the same,as will be described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference i11- dicatecorresponding parts in all the figures.

Figure l is an end elevation of the improvement. Fig. 2 is a frontelevation of the same with part broken out, and Fig. 3 is an enlargedsectional end elevation of the improved centrifugal proper on the line 33 of Fig. 2.

The improved centrifugal machine is mounted on a suitable bed A, onwhich are erected standards B, connected with each other at the top andon opposite sides by channel-beams C, to which the legs D of the curb' Dare bolted, it being understood that two or more properly-spaced curbsmay be set on one pair of beams between the standards B, if desired. Ineach curb D is mounted to rotate a basket E, formed atits bottom E witha downwardly-extending hub E2, fastened by bolts F to a iiange G of thehub G2 for a pulley G, disposed vertically aud below the lower ends ofthe beams C, as is plainly indicated in the drawings, so that the beltpassing over the said pulley G for rotating the basket E passes underone of the beams to the driving machinery. (See Fig. l.)

The hub G2 for the pulley G is fitted on the spindle H, (see Fig. 3,)which is provided at its upper end with a reduced portion Il', uponwhich fits the hub E2 of the basket E. The spindle is engaged at its topby a nut H2, screwing on its extreme upper threaded end and securing itto the hub of the basket E. A key H3 on the reduced portion H' engagesin an aperture in the hub E2', so that the spindle rotates with the huband consequently with the basket and pulley.

It is evident that by the arrangement described the spindle is not onlythe axis on which the basket revolves, but it also at the same timeguidesV and steadies it; .but no power is conveyed through the spindle,as the pulley G is bolted directly to the hub of the basket E, andconsequently the rotary motion given to the pulley by the drivin g-beltrotates the basket E in contradistinction to machines as heretoforeconstructed in which the power is transmitted to the pulley and thespindle and then from the spindle to the basket. It will be seen andreadily understood that the lon-g hub G2 of the pulley, which lits thespindle H and is bolted to the hub of the basket E, virtually forms along hub for the basket E, and whatever strain there may be from thegyration of the basket when in operation it will produce no shearingeffect on the bolts F.

The lower end H4 of the spindle Il is set to turn in a bearing I, havinga flange I bolted to the upper end of an oil-box J, formed with anexternal annular flange J', which is seated or rests on a rubber ring K,and pressing o n it at its top is a similar but thicker rubber ring K',as plainly indicated in Fig. 3.

The lower rubber ring K rests on a step L, carried by an annular flangeon a bracket N, which is bolted to the under side of the beams C. Anannular downwardly-extending rim O incloses both rings and has at itsupper end an inwardly-extending ange that covers the upper ring K,and atthe lower extremity of the `above-mentioned rim O it has anoutwardlyextending ange O2, engaged by bolts O3, carried by the bracketN so that the cup O can be drawn downward with the desired forceto givethe necessary tension and resistance `to the upper ring K. l The officeof the rubber rings K K is two- IOO ' basket and its load will coincidewith the center line of the machine, so the iiexibility of the boxallows the machine to find its own center when running. Now by makingthe upper ring K the yielding one and the lower I one K to be a thinnerone and of less compressibility the whole compression of the rubber ringtends to keep the box, which of course includes the spindle and basket,in an upright vertical position and to resist to a certain extent thegyrations of the basket.

Between the beams G is iitted a pulleyshield P, preferably made in twoparts and fastened by bolts P to the inner faces of the beamsC C, thesaid pulley-shield being inclined and constructed in such a manner thatthe discharge from the basket E passes downward between the beams C CWithout coming in contact with the pulley land the belt for driving thepulley. I

Inthe bottom E of the basket E and next to the hub E2 is arranged theusual outlet E3 for discharging the material from the basket afterthe-operation is completed. This outlet E3 is normally closed by aring-valve Q, of thin sheet metal, and I provide in the valve a cap Qof'inverted-dish form for closing the openingin the center of the valveQ and of such form as to allow the valve to rest on and cover theopening or discharge in the basket E. With this construction I can makethe internal diameter of the valve Q a loose and easy t over thestationary cup R, protecting the nuts-of the bolts F and thenut H2 onthe end ofthe spindle without any leakage being possible at the internaldiameter' of the valve. I-place `and attach to the cap Q a handle Q3 4ofconvenient form to lift out-and operate said-valve.

The hub E2 is slightly beveled and terminatesin a similarly-beveledoverhang G5,

formed on the flange G', the base of the iiangel over-hanging theannular flange P2 of the pulley-shield P, so that the material fallingdown through the` outlet ES onto the shield P and down the inclinedsides thereof is dedected and .cannot pass inside of the flange P2 ofthepulley-shield.`

The curb-gutter D pitches toward the in- I side `or-'center of the curband terminates in a rounded channel D2, and an opening D3 at one side isprovided for the discharge of the purgings from the basket.

It will-.be understood that the pitch or inclination given to the gutterreduces the area that p nrgings will adhere to and lie at, as in flatbottomsas usually constructed, and the rounded .part D2 being disposedas near the center or inside as possible reduces the travel of thepurgings seeking the outlet and so making a more ready discharge ofliquors of a viscous nature.

The standards B have their sides B inclined, as plainly indicated inFig. l, and are constructed to receive and have attached.

thereto beams S, which extend upwardly, and on their upper end aresecured to a saddle or cradle S to support a mixer or receptacle T tohold the material to be drawn olf and run through themachine.

A belt U, which passes over the pulley G, passes with one run under anidler U and around the driving-pulley U2, driven in the usual manner togive the desired rotation to the'pulley G and the basket E; The materialdischarged from the basket over the pulley-shield P, between the beamsC, as previously explained, falls upon the usual conveyer-belt V, drivenfrom the machine to carry the material to one side. The pulley G isprovided at its upper end with a fiange G2, which prevents the belt Ufrom slipping upward, and the hub portion G4, above the belt-flange G2,permits the application ofa brake-band for braking the machine to bringthe basket quickly to a standstill after the driving-belt is stopped.

By the construction described great stability and compactness are givento the machine,

as the curb and machine `are brought down shield the top of which isprovided with' anopening through which the hub df the pulley passes, andthe opening ofthe top of the shield being provided with anupwardly-projecting flange meeting that of the hub, a basket attached tothe upper end of the hub of the pulley and having a central discharge-`opening deliveringvupon the top of the pulley-shield, and a curbinclosing the basket.

2. In a centrifugal machine, the combination with a frame, of a bearingheld thereby, a spindle mounted in the bearing, a pulley'the 4hub ofwhich is attached to the spindle, and

the pulley inclosing the bearing, a iiange attached tothe hub ofthepulley, a basket, a hub for the basket, fastening devices passedthrough the basket-hub and ange to attach the basket to the pulley, `acurb inclosing the basket and mounted on the frame and at the peripherythereof, and a pulley-shield secured to the'frameland locatedv belowthel basket and having a central orifice through which is passed the hubof the pulley.

3. In a centrifugal machine, the combination with a framing, of abearing mounted to gyrat in the fram-ing, a spindle mounted to IOO IIO

turn in the bearing and to gyrate therewith, a basket attached to thespindle, a pulley in connection with the basket and encircling thespindle below the basket, and a pulley-shield mounted below the basketand above the pulley, and having a Central opening through which thespindle is passed, so'that the spindle may gyrate in the opening.

4E. In a centrifugal machine, the combination with a framing, of abearing mounted to gyrate therein, a spindle mounted to turn in thebearing and to gyrate therewith, a basket attached to the spindle, apulley the hub of which is provided with a ii'ange, fastening devicesfor holding the flange of the pulley to the basket, and a pulley-shieldmounted below the basket and above the pulley, and having a Centralorifice through which the spindle' extends, whereby to permit thespindle to gyrate with the basket, the pulley-shield having anupwardly-extended flange around said opening, the said flange extendingupward to proximity with the flange on the hub of the pulley.

FRANK L. DEPEVi Witnesses:

THEO. G. IIosTER, EVERARD BOLTON D'IARSHALL.

